1. Introduction
Thank you for choosing the DEERMA 5L Top Fill Ultrasonic Cool Mist Air Humidifier and Essential Oil Diffuser, Model SJS100. This manual provides important information regarding the safe operation, setup, maintenance, and troubleshooting of your device. Please read it thoroughly before use and retain it for future reference.
Important Safety Information
- Avoid direct skin contact with undiluted essential oils.
- Keep the device out of reach of children and pets.
- Ensure proper ventilation during use.
- Always unplug the humidifier before cleaning or refilling.
- Do not immerse the base unit in water.
2. Product Components
Familiarize yourself with the main parts of your DEERMA SJS100 Humidifier:

- Water Tank: 5-liter capacity for extended operation.
- Base Unit: Contains the ultrasonic atomizer, fan, and control panel.
- Top Lid: Removable for direct water filling.
- Mist Outlet: Where the cool mist is dispersed.
- Water Level Indicator: Transparent strip on the water tank to monitor water levels.
- Mist Control Dial: For adjusting mist output volume.
- Night Light Button: Activates or deactivates the night light feature.
- Essential Oil Tray: A small drawer for adding essential oils.
- Activated Carbon Device: Built-in for odor absorption.
3. Setup
3.1 Initial Placement
Place the humidifier on a flat, stable, and water-resistant surface at least 6 inches (15 cm) away from walls and furniture. Ensure the mist outlet is not directed at walls or electronic devices.
3.2 Filling the Water Tank
The DEERMA SJS100 offers three convenient methods for adding water:
- Direct Top Fill: Pour water directly into the top opening without removing any parts.
- Lid Removal: Remove the top lid and pour water into the tank.
- Tank Lift: Lift the entire water tank from the base and fill it from the bottom. Ensure the tank is securely placed back on the base after filling.

Use clean, cool tap water. Distilled or demineralized water is recommended to prevent mineral buildup and white dust.
3.3 Power Connection
Plug the power cord into a standard electrical outlet. The humidifier is now ready for operation.
Video 3.1: This video demonstrates the various features of the Deerma SJS100 Humidifier, including the three water filling methods, mist output adjustment, night light function, and essential oil tray. It provides a visual guide to setting up and operating the device.
4. Operating Instructions
4.1 Power On/Off and Mist Control
To turn on the humidifier, rotate the mist control dial clockwise. The device will start producing mist. Continue rotating the dial to adjust the mist output volume from low to high. To turn off the humidifier, rotate the dial counter-clockwise until it clicks into the 'off' position.


4.2 Night Light Function
Press the night light button (indicated by a light bulb icon) to activate the warm orange night light. This light provides a calm and peaceful ambiance. Press the button again to turn off the night light.

4.3 Essential Oil Diffuser
Locate the essential oil tray on the side of the base unit. Pull out the tray and add a few drops of your favorite essential oil onto the absorbent pad. Slide the tray back into place. The fan will circulate the aroma with the mist.

4.4 Automatic Shut-Off
The humidifier is equipped with an automatic shut-off feature. When the water level in the tank becomes too low, the indicator light will turn red, and the device will automatically power off to prevent damage.
5. Maintenance
Regular cleaning is essential to ensure optimal performance and hygiene of your humidifier.
5.1 Daily Maintenance
- Empty any remaining water from the tank and base.
- Wipe down the water tank and base with a clean, damp cloth.
- Refill with fresh water before each use.
5.2 Weekly Cleaning
To remove mineral deposits and ensure clean mist:
- Unplug the humidifier and remove the water tank.
- Pour 1 cup of white vinegar into the water tank and base. Let it sit for 20-30 minutes to loosen mineral buildup.
- Use a soft brush or cloth to clean the inside of the tank and the ultrasonic atomizer in the base.
- Rinse both the tank and base thoroughly with clean water until the vinegar smell is gone.
- Remove the fog tube for cleaning by gently pulling it upwards. Clean it with a soft brush and rinse. Reinsert it securely.
- Clean the essential oil tray and replace the absorbent pad if necessary.

5.3 Storage
If the humidifier will not be used for an extended period, clean it thoroughly, ensure all parts are dry, and store it in a cool, dry place.
6. Troubleshooting
Before contacting customer support, please refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output | Low water level Mineral buildup on atomizer Mist control dial set too low | Refill water tank Clean the atomizer with vinegar solution Rotate mist control dial clockwise to increase output |
| Water leakage from base | Water tank not seated properly Damage to water tank or seals | Ensure water tank is correctly aligned and seated on the base Inspect tank and seals for damage; contact support if damaged |
| Unpleasant odor from mist | Stagnant water Dirty water tank/base Activated carbon device needs cleaning | Empty and refill with fresh water daily Perform weekly cleaning as described in Section 5.2 Clean or replace the activated carbon device |
| Night light not working | Light button not pressed Device unplugged | Press the night light button Ensure the humidifier is plugged in and powered on |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Deerma |
| Model Number | SJS100 (Item model number: 783710463302) |
| Capacity | 5 Liters |
| Mist Output | Up to 330ml/hr |
| Recommended Coverage Area | Up to 270 square feet |
| Power Source | Corded Electric |
| Wattage | 25 watts |
| Special Features | Automatic Shut-Off, Night Light, Essential Oil Tray, Activated Carbon Device |
| Material | Plastic |
| Product Dimensions | 8.82 x 8.19 x 12.99 inches |
| Item Weight | 6.14 pounds |
| Manufacturer | FOSHAN SHUNDE DEERMA ELECTRIC APPLIANCES CO., LTD |
8. Warranty and Support
Your DEERMA SJS100 Humidifier is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or contact the retailer. If you encounter any issues not covered in the troubleshooting section or require further assistance, please contact DEERMA customer support through their official channels or your point of purchase.





